Be quiet! I have ___________ to tell you.
English is ________ useful language so that most people speak it as ________ second language.
You don’t know ______ I want to see you again. It’s a year since I last saw you.
May the fourth is the day __________ we Chinese people will never forget.
--Don’t worry. My mother will look after your baby __________. --Thanks a lot.
—Excuse me, could you help me take this chair to my office? —I’m sorry, ______ I can’t help you right now. I’m too busy.